Dell XPS 13 7390 2-in-1 Service Manual page 23

Steps
1. Loosen the captive screw (M1.6x3) that secures the display-cable bracket to the system board.
2. Lift the display-cable bracket off the system board.
3. Peel the tapes that secure the display cable and camera cable to the system board.
4. Using the tape as a pull tab, disconnect the display cable and camera cable from the system board.
5. Remove the display cable and camera cable from the routing guides on the system board.
6. Remove the screw (M1.6x3) and the screw (M1.6x2) that secures the type-C bracket to the system board.
NOTE: The M1.6x2 screw has a bigger head than the M1.6x3 screw.
7. Lift the type-C bracket off the system board.
8. Disconnect the speaker cable from the system board.
9. Open the latch and disconnect the fingerprint-reader cable from the system board.
10. Peel off the fingerprint-reader daughter-board from the system board.
11. Open the latch and disconnect the keyboard-controller board cable from the system board.
12. Remove the four screws (M1.6x2.5), three screws (M1.2x3), and one captive screw (M1.2x4) that secure the system board to the
palm-rest assembly.
13. Lift the system board off the palm-rest assembly.
Removing and installing components 23